I'm still spotting this is the 10th day!! What's goin on

My period usually last 5 days and ends right away and today is the 10th day and I'm still spotting!!! It's very light but it's driving me crazy every time I put on underwear I think it's over and don't need a pad then I spot on my underwear this is the 6th underwear i get dirty please tell me what you think this is ??? Never happened before ? But wen I wake up it's waterly but still spotting